The story
From the notion that an elderly lady would need an assistive device because she is physically weak.
Etymology from Wiktionary, CC BY-SA 4.0.
granny knob
Today it means: Synonym of Brodie knob (“knob on a steering wheel”). Full definition →
Today it means: Synonym of Brodie knob (“knob on a steering wheel”). Full definition →
From the notion that an elderly lady would need an assistive device because she is physically weak.
Etymology from Wiktionary, CC BY-SA 4.0.